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钻孔灌注桩为什么要清孔
更新时间: 2020-11-07 00:00:00  

钻孔灌注桩要清孔是为了清理孔底沉渣厚度、调节孔内泥浆比重、稠度、粘度,为下一步灌桩做准备。清孔通常是对端承桩而言的。对于这种桩,上部荷载主要是由桩端持力层承担的,而桩主要是起到传递上部荷载的作用,由于孔底沉渣是松散的,没有任何承载能力,假如太厚,会造成桩的沉降过大,沉降量无法达到设计或使用要求,所以,在钻孔灌注桩施工过程中需要对孔底沉渣进行清理。

关键词: 钻孔 灌注桩 为什么

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